Colt Style Compatible
This is ProMag's 9mm Magazine Adaptor Block. It easily installs in AR-15 lower-receivers and allows the use of 9mm Colt SMG in Colt pattern 9mm upper-receivers. The block is constructed of high a strength polymer with steel...

Designed for quick caliber change between 5.56mm and 9mm with minimal effort. Adapter loads in from the bottom of the magazine well and secures with a tension device. Ideal for users using Colt magazines and frequently changing between calibers that...

This lower receiver kit includes everything needed to build a complete a lower receiver, less a stock assembly and stripped lower receiver of your choice. All parts are made to standard military specs. Kit Includes: Bolt Catch, Bolt Catch Plunger, Bolt...